Class AbstractXObjValidator

    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected PreflightContext context
      The validation context which contains useful information to process validation.
      protected COSDocument cosDocument
      The PDF document as COSDocument.
      protected COSStream xobject
      The XObject to validate as a COSStream.
    • Method Summary

      All Methods Instance Methods Abstract Methods Concrete Methods 
      Modifier and Type Method Description
      protected abstract void checkMandatoryFields()
      This method checks if required fields are present.
      protected void checkOPI()
      According the ISO 190005:1-2005 specification, a XObject can't have an OPI entry in its dictionary.
      protected void checkPostscriptXObject()
      According the ISO 190005:1-2005 specification, PostScript XObjects are forbidden.
      protected void checkReferenceXObject()
      According the ISO 190005:1-2005 specification, a XObject can't have an Ref entry in its dictionary.
      protected void checkSMask()
      This method checks the SMask entry in the XObject dictionary.
      void validate()
      Process the validation of the XObject.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Field Detail

      • xobject

        protected COSStream xobject
        The XObject to validate as a COSStream.
      • context

        protected PreflightContext context
        The validation context which contains useful information to process validation.
      • cosDocument

        protected COSDocument cosDocument
        The PDF document as COSDocument.
    • Method Detail

      • checkSMask

        protected void checkSMask()
        This method checks the SMask entry in the XObject dictionary. According to the PDF Reference, a SMask in a XObject is a Stream. So if it is not null, it should be an error but a SMask with the name None is authorized in the PDF/A Specification 6.4. If the validation fails (SMask not null and different from None), the error list is updated with the error code ERROR_GRAPHIC_TRANSPARENCY_SMASK (2.2.2).
      • checkOPI

        protected void checkOPI()
        According the ISO 190005:1-2005 specification, a XObject can't have an OPI entry in its dictionary. If the XObject has a OPI entry, the error list is updated with the error code ERROR_GRAPHIC_UNEXPECTED_KEY (2.3).
      • checkReferenceXObject

        protected void checkReferenceXObject()
        According the ISO 190005:1-2005 specification, a XObject can't have an Ref entry in its dictionary. If the XObject has a Ref entry, the error list is updated with the error code ERROR_GRAPHIC_UNEXPECTED_KEY (2.3).
      • checkPostscriptXObject

        protected void checkPostscriptXObject()
        According the ISO 190005:1-2005 specification, PostScript XObjects are forbidden. If the XObject is a PostScript XObject, the error list is updated with the error code ERROR_GRAPHIC_UNEXPECTED_VALUE_FOR_KEY (2.3.2). To know whether the object is a Postscript XObject, "Subtype" and "Subtype2" entries are checked.
      • checkMandatoryFields

        protected abstract void checkMandatoryFields()
        This method checks if required fields are present.